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What a registered agent costs by state / South Dakota
3 Best Registered Agents in South Dakota (2026): What You Pay
For 2026, we would price out Mainstay Filing ($149/yr), South Dakota Registered Agent.co ($99/yr) and SD Registered Agent.org ($99/yr), in that order, before any other South Dakota registered agents. A registered agent will charge you $99 to $149 to start, adding up to $297 to $447 over three years.
Written by the Price Your LLC editorial team
↓ Ranked for you by:Ranking = 38% what you spend + 31% work covered + three smaller factors (details)
The short version
Is it required?Yessdlegislature.gov (we looked on October 2026, so you can too)
Your first-year spend$99 to $149Cost of one agent year
Three-year range$297 to $447Three years of service fees
Annual report$55 a yearsdlegislature.gov (we looked on October 2026, so you can too)
Bills cross inNeverOrder never flips
Your South Dakota options
Options sit in value order, with prices taken from company pages. State fees are the same whoever serves as agent.
#Ranked for you byYou pay in year 1You pay at renewalYou pay over 3 years
1
Start here
1. Mainstay Filing: best for the same price in every state
$149 a year, moving to $149
You pay in year 1$149
You pay at renewal$149/yr
You pay over 3 years$447
Start with Mainstay Filing. A flat $149 a year, whichever state you pick.
Choosing South Dakota Registered Agent.co would leave $150 in your pocket over three years and more filings on your desk.
Your price covers
An office address inside the state
Up to three government mailings a year, scanned for you free
Covers LLCs, corporations, LPs, LLPs and nonprofits
What you get
Travels with your company
$149 a year, no change at renewal
What to watch
$50 a year above South Dakota Registered Agent.co
Agent service only, reports stay with you
2
South Dakota only
2. South Dakota Registered Agent.co: best for the smallest three-year total
$99 a year, moving to $99
You pay in year 1$99
You pay at renewal$99/yr
You pay over 3 years$297
Next, South Dakota Registered Agent.co: $99 yearly, with a street address in the state on file.
Your price covers
A street address inside the state
Web copies of legal papers
What you get
Undercuts Mainstay Filing every year
Year 1 $99, year 2 $99
What to watch
No help outside the state
Does not cover the annual report
3
South Dakota only
3. SD Registered Agent.org: best for keeping your agent in state
$99 a year, moving to $99
You pay in year 1$99
You pay at renewal$99/yr
You pay over 3 years$297
Next, SD Registered Agent.org: $99 yearly, with a street address in the state on file.
Its prices match South Dakota Registered Agent.co's exactly.
Your three-year bill from the state is made of the filing fee, the reports due in years two and three, and a yearly minimum tax in states that levy one. Anything the state does not put a fixed price on, a newspaper notice for example, is described but never added.
Why number one is number one
Mainstay Filing wins upkeep the price covers, worth 31%, with South Dakota Registered Agent.co close behind.
If you ever expand, South Dakota Registered Agent.co cannot follow you.
What South Dakota requires of your registered agent (South Dakota Secretary of State)
Every LLC must name a registered agent with an in-state street address.
A commercial registered agent listed with the state, a noncommercial agent (an individual or entity with a South Dakota address), or the title of an office in the company. Look up SDCL 59-11-6.
The address has to be an actual street address or rural route box number in South Dakota, plus a South Dakota mailing address if it differs.
Official text: sdlegislature.gov (we looked on October 2026, so you can too)
State fees only
If you qualify, you can name yourself and pay no agent fee, and state fees stay the same. The services above charge $99 to $149 a year for a South Dakota address and a person to accept legal papers.
South Dakota money questions
How much will a South Dakota registered agent cost me per year?
Expect $99 to $149 a year.
What do three years of agent service cost?
$297 to $447 in service fees, with state fees on top.
Do I have to have a registered agent for a South Dakota LLC?
Yes, you do. Every LLC must name a registered agent with an in-state street address.
Can I be my own registered agent?
You can, provided you meet both the address and eligibility rules.
What will the state charge my LLC each year?
Budget $55 every year for the annual report, due due during the entity's anniversary month.
When does one service end up costing more than another?
Over ten years the totals never swap places.
Which registered agent is the best value for me in South Dakota?
Mainstay Filing, which wins on upkeep the price covers. South Dakota Registered Agent.co and SD Registered Agent.org follow.